JPS5916824Y2 - Optical axis adjustment mechanism for optical detection devices, etc. - Google Patents

Description

[Detailed explanation of the idea] TECHNICAL FIELD The present invention relates to an optical axis adjustment mechanism for a light beam detection device, etc.

For example, when installing a light beam detection device, it is necessary to adjust the optical axis so that the light beam emitted from the light emitting section of the light emitting device correctly enters the light receiving section of the light receiving device.

Conventional optical beam detection devices often have an oval-shaped hole in the mounting bracket for attaching the device to a mounting base, and the optical axis is adjusted by slightly moving the entire device horizontally and vertically through these holes. However, with this type of structure, it is not possible to securely fix the device to the mounting base until the optical axis adjustment is completed, and the device is unstable, especially if the detection distance is long, so adjustment requires time and skill. Moreover, even if the adjustment is made, if the fixing bolt is tightened too much or not tightened enough, the optical axis may shift.

There are also devices that have a built-in optical axis adjustment mechanism, but because the screws for fixing the horizontal direction and the screws for fixing the vertical direction are provided separately, it is not possible to fix both at the same time. There are some aspects that make it difficult to use.

In this invention, the light emitting part or the light receiving part is supported pivotably on a support base so as to be able to rotate in the horizontal direction, and the optical axis is adjusted in the horizontal and vertical directions. The optical axis can be adjusted at the same time, and after adjustment, it can be fixed with a single screw.The purpose of this is to make it possible to easily adjust the optical axis in a stable state, and to fix it easily. The objective is to obtain an optical axis adjustment mechanism.

An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a light emitting part of a light emitting device, which has horizontal shafts 2 on both sides, and a protrusion 3 at the bottom.

Reference numeral 4 denotes a rotary table, which has support pieces 5 facing each other on its upper surface, and a vertical protrusion 6 on its lower surface.
An elongated hole 7 is bored at a position corresponding to .

Reference numeral 8 denotes a disk-shaped stopper plate, which has a groove 9 in the radial direction that is slightly wider than the diameter of the projection 3, as shown in FIG.

Reference numeral 10 denotes a support base having a flange portion 11 formed at its upper end.
A vertical shaft 12 is provided protruding from the center of the upper surface.

13 is a fixing screw, and 14 is a piece that is screwed together with the fixing screw 13.

The assembly relationship of these components is such that the stopper plate 8 is sandwiched between the rotary table 4 and the support table 10 so that the central part of the rotary table 4 and the stopper plate 8 can be freely rotated about the vertical axis 12 of the support table 10. The rotary table 4 is fitted and installed so that
The horizontal shaft 2 of the light emitting section 1 is attached to the support piece 5 of the light emitting section 1 to support the light emitting section 1 so that the light emitting section 1 can rotate vertically about the horizontal shaft 2.

The projection 3 of the light emitting part 1 is inserted into the elongated hole 7 of the rotary table 4, and the tip of the projection 3 is engaged with the groove 9 of the stopper plate 8, and the fixing screw 13 is inserted through the rotary table 4. The rotating base 4 is attached to the tip of the fixing screw 13.
The vertical protrusion 6 of the support base 10 and the piece 14 extending over the flange portion 11 of the support base 10 are screwed together.

The optical axis adjustment mechanism of the present invention configured in this way is built into the exterior case of the light emitting device.

Next, the operation of the present invention will be explained.

First, when the fixing screw 13 is loosened, the rotary table 4 and the stopper plate 8 can be rotated, so the rotary table 4 can be moved to the support table 10.
When the light emitting part 1 is rotated horizontally around the vertical axis 12 of the light emitting part 1, the light emitting part 1 rotates together with the rotary table 4, and the optical axis can be adjusted in the horizontal direction. The stopper plate 8 that is engaged with also rotates.

On the other hand, the vertical optical axis adjustment of the light emitting section 1 is performed by rotating the light emitting section 1 about the horizontal axis 2.

When the light emitting part 1 is rotated in the vertical direction, the projection 3 tilts together with the light emitting part 1 and moves along the elongated hole 7 of the rotary table 4, and as the projection 3 moves, the stopper plate 8 rotates.

After adjusting the optical axis in this way, when the fixing screw 13 is tightened, the top 14 is pressed against the vertical ridge 6 of the rotary table 4 and the flange portion 11 of the support table 10. is fixed to the support base 10, and at the same time, the stopper plate 8 is clamped between the rotary base 4 and the support base 10 and cannot rotate, so that the protrusion 3 engaged with the groove 9 of the stopper plate 8 is fixed. Therefore, the light emitting section 1 can be fixed in the horizontal and vertical directions at the same time.

Although the above embodiment has been explained using the light emitting section of the light emitting device, it is of course applicable to the light receiving section of the light receiving device, and one or both of them may be provided with the above-mentioned optical axis adjustment mechanism to adjust the optical axis. By making adjustments, the optical axes can be easily aligned.

In order to determine whether the optical axes of the light-emitting part and the light-receiving part are aligned, it is preferable to separately provide an indicator light or the like at an appropriate location of the device, so that the judgment can be made by the lighting of this indicator light.

Furthermore, the optical axis adjustment mechanism described above can be applied not only to a type of detection device in which a light emitting device and a light receiving device are directly opposed to each other, but also to a type of detection device in which a light emitting device and a light receiving device are installed on the same side using a reflector or the like. Applicable.

As explained above, the present invention is based on a rotary table that is rotatably supported on a support base so that it can rotate horizontally, and a light emitting part or a light receiving part that is rotatably supported vertically on a rotary table, and these parts are connected with a single screw. Since it is configured so that the optical axis of the light emitting part or the light receiving part can be adjusted in the horizontal and vertical directions simultaneously in a stable state, it is possible to adjust the optical axis of the light emitting part or the light receiving part and the rotary table at the same time. Since they can be fixed at the same time, the optical axis can be adjusted easily in a short time.

Furthermore, since the optical axis adjustment mechanism of the present invention is built into the exterior case of the light emitting device or the light receiving device, it has the advantage that it is difficult to be tampered with from outside.

Furthermore, the optical axis adjustment mechanism of the present invention can be applied to, for example, fixing radio waves, sound waves, etc. in a certain direction in addition to light beams, and can be widely used.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional front view showing an embodiment of the present invention, Fig. 2 is a partially sectional side view, and Fig. 3 is a plan view showing an example of the shape of the stopper plate. . 1... Light emitting part, 2... Horizontal axis, 3...
...Protrusion, 4...Rotary table, 5...
Support piece, 6... Vertical ridge, 7... Elongated hole, 8... Stopper plate, 9... Groove, 10
...Support stand, 11 ...Flange part, 1
2... Vertical edge, 13... Fixing screw, 14... Piece.

Claims (1)

[Scope of utility model registration request] 1. In the optical axis adjustment mechanism that adjusts the optical axis in the horizontal and vertical directions, the light emitting part or the light receiving part is placed on a rotary table that is pivoted on a support base so that it can be rotated in the vertical direction. A stopper plate is rotatably provided between the support base and the rotary base, and the protrusion provided at the lower part of the light emitting part or the light receiving part is inserted into the elongated hole provided on the rotary base, and the protrusion is An optical axis adjustment mechanism for a light beam detection device, etc., characterized in that a tip of the stopper plate is engaged with a groove provided in the stopper plate. 2. The light beam detection according to claim 1 of the utility model registration claim, characterized in that a fixing screw is attached to the rotary table, and the rotary table and the stopper plate can be fixed to the support table by the fixing screw. Optical axis adjustment mechanism for equipment, etc.